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导出了曲率半径与逼近误差之间的关系和等误差条件下的参数递推公式 ,建立了通过逼近圆弧圆心的直线方程和圆心坐标计算公式 .按这种方法用圆弧逼近平面参数曲线 ,不需要求解非线性方程组 ,避免了计算可能不收敛的麻烦 ,简化了非圆曲线的节点计算过程 .
The relationship between the radius of curvature and the approximation error and the recursion formula of the parameters under the condition of equal error are deduced.The formula of the line equation and the center of the circle through the approximation of the circle center is established.According to this method, It is not necessary to solve the system of nonlinear equations, which avoids the inconvenience that the calculation may not converge, and simplifies the calculation of the nodes of the non-circular curve.